2016 physiology midterm Flashcards
which type of communication, the chemicals are released by one cell and diffuse to the neighboring cells?
a- endocrine
b- paracrine
c- nuerocrine
b- paracrine
What is true about the activation gate and inactivation gate during resting membrane?
a- both are closed
b- both are opened
c- activation gate is opened, inactivation gate is closed
d- activation gate is closed, inactivation gate is opened
d- activation gate is closed, inactivation gate is opened
Which hormone only acts on the surface receptor? a- insulin b- thyroxine c- estrogen d- cortisol
a- insulin
Which is the fastest way to transport vesicles in a cell? a- COPE1 b-COPE2 c- clatherin d- microtubules
d- microtubules
What subject has the highest water percentage ?
a- 20 year old female
b- 70 year old male
c- 20 year old athletic male
c- 20 year old athletic male
if we added 100ml 0f 2% NaCl to 400ml of 1% NaCl, what is the total concentration of the solution? a- 6% b- 1.2% c- 3% d- 2.1%
b- 1.2%
What is the function of phosphorylated R1?
a- recruit STAT
b- activates SMAD
b- activates SMAD
Na outside cell= 14 Na inside cell= 140 What is the membrane potential? a. 61 mv b. -61 mv c. 3.2 mv d. -3.2 mv
b. -61 mv
Na outside cell= 14 Na inside cell= 140 K outside cell= 150 K inside cell= 5 The channels for each are equal in number, what is the membrane potential? a. 61 mv b. -61 mv c. 3.2 mv d. -3.2 mv
c. 3.2 mv
Na outside cell= 14 Na inside cell= 140 K outside cell= 150 K inside cell= 5 All Na channels are open and half of the K channels are open. What is the membrane potential? a. 61 mv b. -61 mv c. 12.5 mv d. -12.5 mv
d. -12.5 mv
What is a characteristic of action potential?
a- the response gets weaker further away from the stimulus
b- All or none characteristic
c- summation of stimulus increases the response
b- All or none characteristic
What is the electrical potential of a cell that has 142mM of K+ inside and 14.2mM of K+ outside? a- 61 mv b- -61 mv c- 90 mv d- -90 mv
c- 90 mv
If a cell secretes a substance into the extracellular fluid and then bind to the receptor in nearby cells, what type of communication is that?
a- endocrine
b- paracrine
c- intercrine
b- paracrine
which factor mainly contribute to membrane potential in a nerve cell with resting membrane potential of -90 mv? a- equilibrium potential of Ca ++ b- equilibrium potential of Na+ c- equilibrium potential of K+ d- action of Na+ and K+ pump
c- equilibrium potential of K+
In a hot environment , subject had ( TBW = 60 – Osmolarity = 300 mOsm/L ) and he lost 1.5 L of sweat (0.2% NaCl ). What is the osmolarity after sweating?
309.4
